Rabu, 05 Januari 2011

CCTV (Close Circuit Television) system consists of several interrelated components

A CCTV system consists of several interrelated components to help owners monitor events in real time or do the play-back events in the distant past. In order to achieve optimum function of a CCTV system generally consists of several components such as:
CCTV Camera (Camera Monitoring): tools that are placed at locations to be monitored to capture video images. The video image can be sent in the form of analog or digital.
Recorder (Recorder): an instrument used to record video that is sent by a CCTV camera. Recording can be either analog or digital.
Monitor: a tool used to see in real time video images or video recordings. Monitoring can be done locally (in area buildings) or remotely
CCTV motorized Controller: This tool is used to move the PTZ (Pan Tilt Zoom) motor contained in the CCTV Camera.

By combining the components - the components above, it can be made of a CCTV System. There are 2 kinds of CCTV system configurations that are widely used at present:
Analog CCTV Camera Configuration: This configuration of the video images generated by cameras in the form of an analog signal that is transmitted through coaxial cable, analog video is then captured by the recorder and then is transformed into a form of digital data before it is saved into the Hard Disk. Digital Video Recorder to transmit digital video via the web network.

Configuring IP CCTV Camera (Network Camera): In this configuration the video image generated by the network camera has a digital form and sent directly to the network line. Network Recorder is connected to the same network line to receive digital video sent by the CCTV cameras and store them into the Hard Disk. Computers that connect to the network can access live video from cameras or access the recording on Network Recorder.

Both the above configuration has advantages and disadvantages. The first configuration uses an analog camera cable infrastructure will require more and more expensive, the stored video images may also have experienced changes due to distance and interference. This problem is not experienced when using IP cameras because the output data is in digital form and only use one data cable (UTP Cat5). However, the cost of IP cameras currently much higher than the price of analog cameras, IP cameras in addition also require a better network infrastructure to support streaming data from multiple IP cameras simultaneously.

Indoor Dome Camera

Indoor dome cameras used in 90% of general indoor applications. It comes in various configurations, including standard color, Day / Night, and infrared versions. It can be installed in horizontal or vertical, but usually surface mounted ceiling. Dome camera lens option to restrict their use in certain applications such as requiring more than a 20mm video lens. The dome camera is the primary choice in indoor camera locations.

Box Camera

A box camera standard camera can be mounted alone or in a cage. The box camera uses separate lenses that screw on the front surface and provides flexibility for different requirements and FoV sold without a lens. Auto-iris lens will have a small cable that connects to the camera for iris control in various lighting conditions.

Outdoor Dome Cameras

Outdoor Dome Camera is usually hard shell vandal-roof casings that offer the same flexibility in a variety of lens options. Day / Night external dome cameras are common in applications that entry and exit points with limited lighting at night.

Day / Night Camera

The Day / Night cameras are the best choice for low light conditions. The cameras are standard color daylight conditions, Day / Night camera switches from a mechanical to a low lux B / W mode.

Infrared Camera

During the no-light conditions, Infrared cameras provide infrared illumination FoF allows monitoring of the area without the available light. Te IR LEDs switch on automatically and the camera switches to B / W low lux mode offering camera views in total darkness.

PTZ Camera

Pan-Tilt-Zoom camera offer the ability to see in all directions and optically zoom in as required. PTZ cameras also include standard color, Day / Night mode, and a few IR PTZ cameras have been introduced recently. PTZ CCTV operator can set the camera to automatically rotate different FoVs. Options include automatic tracking applications that dynamically track objects in defined areas.

Camera Enclosure

Box cameras can be mounted in different cages. Outdoor enclosure in cold weather must include a heater / blower that makes frost and condensation from forming on the lens and camera. Heater / Blower 24VAC general and should be considered when selecting a CCTV power supply system.

Camera Location

Camera mounting location is critical to the success of the CCTV project. Cameras should be installed as close as possible to the field of view is required, and the closer the camera to the subject a better identification of the subject will. Proper choice of camera lens relative to the location and the FoV required is essential to image quality.

Digital Video Recorders

DVR is an important part of any successful CCTV project. Video resolution the bigger, faster recording speeds, and video data compression that reduces the file size of video data. Terabyte storage capacity becoming common in many CCTV applications. Network or remote monitoring of CCTV video standards in all professional DVRs on the market in 2007 and video distribution in LAN, WAN, and the Web has provided new markets outside the DVR video security, known as Business Systems Monitoring that allows management to monitor specified business area main for 24 hours a day. No longer just a security video recorder, the DVR has become a tool for business management with remote monitoring applications.

Are the definitions and abbreviations that CCTV?
CCTV stands for Close Circuit Television. CCTV is the use of video cameras to transmit video signals to a specific place, in several sets of monitors. Unlike broadcast television, CCTV signal is not openly transmitted. CCTV is the most widely used for surveillance in areas that need monitoring such as banks, warehouses, public areas, and homes abandoned by their owners.

CCTV systems typically consist of fixed communication (dedicated) between camera and monitor. Modern CCTV technology consists of systems connected to a camera that can be moved (rotated, bent, and on-zoom), can be operated remotely via the control room, and can be connected with a good network LAN, Wireless-LAN and the Internet.

Does CCTV view can only be accessed via the local computer?
Besides can be monitored locally (the same place where the connection between CCTV and a PC connected via wired / wireless directly), CCTV can also be monitored and operated remotely via the control room, and can be connected with a good network LAN, Wireless-LAN and Internet .

Do CCTV cameras to detect in the dark?
For some types of CCTV cameras equipped with infra red, so CCTV can work well in dark conditions and less light. The use of cameras of this type are usually placed in the garage, highways and other rooms that have a changing lighting conditions, sometimes bright and sometimes dark.

Tools are needed to be able to use CCTV?

* DVR (Digital Video Recording), a tool that serves as the "brains" of the CCTV system. DVR receives video signals from any CCTV camera, do the recording and video output signal that can be forwarded to the Monitor. DVRs are now in circulation continues to grow and experience many improvements in the compression system and is equipped with many latest features. One of them is: DVR is equipped with technology-based IP (Internet Protocol Based), with this feature you can monitor the CCTV cameras wherever you are.
* CCTV Camera, a camera CCTV system is required in accepting the video signal at the location you want monitored. In general, CCTV cameras require an adapter to get power flow accordingly.
* Hard Disk, a recording data storage media. Hard disk is installed in the DVR, the larger capacity hard disk allows you to keep records longer
* Coaxial Cable, a cable that delivers the video signals from CCTV cameras to the DVR, or from the DVR to a monitor

2 komentar:

  1. Now these days security of a person and their assets is a vital concern that why lot of money is spend on a security setup. In this manner CCTV Cameras are used which leaves nothing unwatched.

  2. the voltage variation lasts for just a couple of seconds. This small window is insufficient for an intruder to manipulate the network and also make a break. Penrith CCTV